ui/base/cocoa/three_part_image.mm

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/base/cocoa/three_part_image.h"
   6
   7 #include "base/logging.h"
   8 #include "ui/base/resource/resource_bundle.h"
   9
  10 namespace ui {
  11
  12 ThreePartImage::ThreePartImage(int left_id, int middle_id, int right_id) {
  13   DCHECK(left_id);
  14   DCHECK(right_id);
  15   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
  16   leftImage_.reset(rb.GetNativeImageNamed(left_id).CopyNSImage());
  17   rightImage_.reset(rb.GetNativeImageNamed(right_id).CopyNSImage());
  18   leftSize_ = [leftImage_ size];
  19   rightSize_ = [rightImage_ size];
  20
  21   if (middle_id)
  22     middleImage_.reset(rb.GetNativeImageNamed(middle_id).CopyNSImage());
  23 }
  24
  25 ThreePartImage::~ThreePartImage() {
  26 }
  27
  28 NSRect ThreePartImage::GetLeftRect(NSRect bounds) const {
  29   NSRect left, right;
  30   NSDivideRect(bounds, &left, &right, leftSize_.width, NSMinXEdge);
  31   return left;
  32 }
  33
  34 NSRect ThreePartImage::GetMiddleRect(NSRect bounds) const {
  35   NSRect left, middle, right;
  36   NSDivideRect(bounds, &left, &middle, leftSize_.width, NSMinXEdge);
  37   NSDivideRect(middle, &right, &middle, rightSize_.width, NSMaxXEdge);
  38   return middle;
  39 }
  40
  41 NSRect ThreePartImage::GetRightRect(NSRect bounds) const {
  42   NSRect left, right;
  43   NSDivideRect(bounds, &right, &left, rightSize_.width, NSMaxXEdge);
  44   return right;
  45 }
  46
  47 void ThreePartImage::DrawInRect(NSRect rect,
  48                                 NSCompositingOperation op,
  49                                 CGFloat alpha) const {
  50   rect.size.height = leftSize_.height;
  51   NSDrawThreePartImage(rect, leftImage_, middleImage_, rightImage_,
  52                        NO, op, alpha, NO);
  53 }
  54
  55 BOOL ThreePartImage::HitTest(NSPoint point, NSRect bounds) const {
  56   NSRect middleRect = GetMiddleRect(bounds);
  57   if (NSPointInRect(point, middleRect))
  58     return middleImage_ ? HitTestImage(point, middleImage_, middleRect) : YES;
  59
  60   NSRect leftRect = GetLeftRect(bounds);
  61   if (NSPointInRect(point, leftRect))
  62     return HitTestImage(point, leftImage_, leftRect);
  63
  64   NSRect rightRect = GetRightRect(bounds);
  65   if (NSPointInRect(point, rightRect))
  66     return HitTestImage(point, rightImage_, rightRect);
  67
  68   return NO;
  69 }
  70
  71 BOOL ThreePartImage::HitTestImage(NSPoint point,
  72                                   NSImage* image,
  73                                   NSRect imageRect) const {
  74   NSRect pointRect = NSMakeRect(point.x, point.y, 1, 1);
  75   return [image hitTestRect:pointRect
  76       withImageDestinationRect:imageRect
  77                        context:nil
  78                          hints:nil
  79                        flipped:NO];
  80 }
  81
  82 }  // namespace ui